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Meds and you

10 March 2011

Sunlight helps drug absorption

The body's ability to break down medicines may be closely related to exposure to sunlight, and thus may vary with the seasons, a study from Karolinska Institutet has shown.

The body's ability to break down medicines may be closely related to exposure to sunlight, and thus may vary with the seasons, a study from Karolinska Institutet has shown. The findings offer a completely new model to explain individual differences in the effects of drugs, and how the surroundings can influence the body's ability to deal with toxins.

A more detailed analysis showed that the concentrations of drugs such as tacrolimus and sirolimus, which are used to prevent rejection following transplantation, vary throughout the year in a manner that closely reflects changes in the level of vitamin D in the body. The ability of the body to form vitamin D depends on sunlight, and the highest levels in the patients taking part in the study were reached during that part of the year when the levels of the drugs were lowest.

 

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